Wrench.



C. PEDERSEN.

WRENCH.

APPLICATION FILED APR.9.1915.

Patented Sept. 21; 1915.

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61 flfmwua C. PEDERSEN.

WRENCH.

APPLICATION FILED APR-9,1915.

PatentedSept. 21, 1915.

2 SHEETS-SHEET 2.

Earl/l HlllllllHlllHlll avwenboz wi tueooao trap sra'rns AT .1 nrro CARLPEDERSEN, OF FORT WAYNE, INDIANA.

WRENCH.

Application filed April 9, 19 15. Serial I? o. 20,2 58.

Too whom 'itma l concern:

One of the objects of the invention is to provide a device of thischaracter, which shall include a stationary jaw havinga toothed shank, amovable jaw upon the shank, two pawls arranged within the movable jawand eccentrically mounted upon a suitable shaft or bearing, the saidshaft or hearing being provided with an operating lever which isoscillated to cause the dogs to each successively engage with the teethof the shank to move the movable jaw toward the stationary jaw or tolock both of the dogs in engagement with two of the teeth of the shank,when the jaws are to be employed as a clamp, a single piece beingarranged upon one of the said dogs whereby thesame may be actuated toswing the said'do g to cause the same tocontact with the second dog andto bring both of the dogs out of engagement with the teeth, thusproviding for the ready adjustment of the movable aw in either of itsdirections of travel.

7 A further object of the invention is to provide a device of thischaracter which shall embody the desirable features of simplicity inconstruction, cheapness, accuracy and thorough effectiveness inoperation.

In the drawings: Figure 1 is a side elevation of a wrench or clampconstr-uc-tedin accordance with the present 1I1VeI1-1710I1,F1g. 2

is a transverse sectional View approximately on the line 2-2 of Fig. 1.Fig. 3 is a longitudinal sectional view approximately on the line 33 ofFig. 2, Fig. 4. is a similar see I tional view approximately on the line44 of Fig. 2, Fig. 5' is an edge view of the wrench, Fig. 6 is asectional view on the line 6-6 of Fig. 1, Fig. 7 is a sectional view onthe line 77 of Fig. 1, Fig. 8 is a perspec tive view of the shaft forthe dogs, Fig. 9 is a similar view of one of the dogs, and Fig. 10 is asimilar view of the second dog.

Referring now to the drawings in detail, the numeral 1 designates thehead or jaw of the stationary member of the device, and 2 the angularshank therefor. This. shank is preferably rectangular in cross sectionand S ecification of Letters Patent.

Patented S ept. 21,1915.

has one of its edgesprovided with transverse teeth 8. The teeth includesubstantially straight shoulders and transverse walls connecting theshoulders.

The-numeral 4c designates the carriage of the movable jaw, the jawproper comprising a plate 5 arranged adjacent the bore of the carriage 4and having its engaging face serrated, as indicated by the numeral 6,and likewise the engaging face of the aw 1 may be similarly serrated asindicated by the numeral 7. The rear face of the carriage is providedwith a substantiallyright angular depression, forming a pocket 8. Sideplates .9 are secured to the opposite faces of the sides of saidcarriage and provide side members or walls for the pocket 8. These sideplates 9 are provided with alining circular openings 10, the saidopenings receiving'the opposite ends of the shaft 11. The openings 10are of a greater diameter than is the cross sectional diameter of theshaft 11, and

a less cross sectional diameter than the area of the openings 10 so thatthe shaft may be inserted laterally through the said openings 10. Itwill bernoted that the eccentric or cam surfaces 13 and 14- are disposedin opposite directions upon the shaft 11, and one of the ends of theshaft llprojects a suitable distance beyondv its bearing 12, t'he saidend being formed upon one of its sides with a longitudinally extendingdepression 15, said end is adapted to enter an'opening 16 provided inthe head portion 17 of an operating handle 18.

The numeral 19 designates the transverse depression or slot formed inthe head 17 and which communicates with the bore 16 thereof, and thisslot 19 is adapted to register with the depression 15 so that a lockingkey 20 may be inserted withinthe said alining depressions to lock thehandle upon the shaft 11.

Arranged within the pocket 8 and'mounted upon the respective cam oreccentric members 13 and 14 are the body members 21 the peripheralwallsof the said openings 10 and 22 of a pair of dogs indicated by thenumerals 23 and 24 respectively. The adjacent or meeting faces of thebodies are reduced, equaling the thickness approxi mately one-half ofthe cross sectional diameter of thedogs proper, so that the dog 23underlies the arcuate inner edge of the dog 24, the said dogs extendingthrough the pocket 8 and engaging with the teeth 3 of the shank 2. Thebodies of each of the dogs 23 and- 24, at its corner diametricallyopposite that formed with the dog proper, is provided with lugs 25 and26 respectively, each of said lugs being engaged by one of the ends oftwo arm springs 27 and 28 re spectively, and these springs have theirsecond arms received within recesses or depressions provided in the rearwall'of the pocket 8, while still again, the transverse bolt or pinmember 29 is engaged with the said springs 27 and 28 to retain the samein the pocket 8. Extending outwardly from the shoulder 25 is a finger30, the said finger being projected through the pocket 8, and

- it will be noted that by actuating this finger to swing the body 21 ofthe dog 23, the said dog 23 which, as previously stated, underlies thedog 24, and will automatically swing the said dog and of course swingthe dog 23 out'of engagement with the teeth 3 of the shaft 2. v

The operation of the device maybe briefly described as follows: Byswinging the handle 18 from the position shown in the full lines in Fig.1 of the drawings to the position indicated by'the dotted lines inthesaid Fig. 1, and by oscillating the said handle to bring the samesuccessively in such positions, it will be noted that the cam portions13 and'l will successively force each of the dogs 23 and 24 respectivelyalternately into and out of engagement with the teeth 3, thus causingthe jaw of the carriage 4 to travel in the direction of the head or jaw1, and further that when the handle is arranged'at an approximate rightangle to the wrench or in the position illustrated by the full lines inthe said Fig. 1, both of the dogs 23 and 24 are in engagement with twoof the teeth 3, thus providing a clamp between the same. As previouslystated, by operating the finger 30, the jaws will be brought out ofengagement with the teeth so that the carriage 4 may be movedlongitudinally upon the shank 2 to bring its head either toward or awayfrom the body of the stationary jaw. a

From the above description, taken in connection with the accompanyingdrawings, the simplicity of the device, as well as the advantagesthereof will, it is thought, be

perfectly apparent to those skilled in the art to which such inventionappertains without further detailed description.

Having thus described the invention, what I claim is:

In a wrench, a stationary jaw having a toothed shank, a movable jawincluding a carriage mounted upon the shank, said oarriage including apocket, a shaft journaled in the side walls of the pocket, the portionof the shaft in the pocket having reversely arranged cam members, twodogs, each of' said dogs having its body portion reduced to providecontacting faces to permit the engaging end, of one of the, dogs beingdisposed forward and in a line with the active end of the other dog,each of said dogs hav ing their bodies provided with openings equalingthe respective cam members upon the shaft and receiving the said cam memCARL PEDERSEN.

Witnesses:

CARL PASSE, HENRY LAGEMANN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

l i Washington, D. C. i t

